Control system



Oct. 7, 1952 L. KAHN 2,613,255

CONTROL SYSTEM Filed NOV. 10, 1947 2 SHEETS SHEET l In la la M5 Q M59F?) 1 9 8 1 9 1 u. PERFORATOR E DECELERAIOR 8 I RESET INVENTOR 120115,;Kala/n MASTER BY I swncn d i 4 gfl g ATTORNEYS CONTROL SYSTEM Filed NOV.10, 1947 2 SHEETS-SHEET 2 AIR-- SUPPLY INYENTOR Louas Ka hn/ $35 M awATTORNEYS Patented Oct. 7, 1952 CONTROL SYSTEM Louis Kahn, New Bedford,Mass, assignor to Aerovox Corporation, New Bedford, Mass., a

corporation of Massachusetts Application November 10, 1947, Serial No.785,018

This invention relates to electrical controls and, while of more generalapplication, is shown as particularly applied to capacitor windinmachines.

As conducive to a clear understanding of the invention, it is noted thatduringtheprocess of winding capacitor sections on a winding machinethere is a definite sequence of operations that must be followed. ,Inone specific illustrative example of a winding machine, this sequenceincludes starting the rotation of the winding mandrel at a relativelylowspeed so as not to exert a sudden tearing tension on the, paper andfoil, opening the paper feed rollers which grip the paper when closed,acceleration of the winding mandrel, deceleration of the winding mandrelwhen the capacitor is almost wound, perforation of the foil, momentaryclosing of foil grippers which will put a strain on the foil and causeit to tear at the perforations under the tension exerted by the rotatingmandrel, closing of the paper feed rollers so that proper tension willbe maintained on the paper and foil preparatory to cutting, cutting thepaper and initiating a positive stop. mechanism which ensures that thewinding mandrel will stop in the same position after each section iswound.

The timing of this sequence of operations is based on the number ofturns being wound on each capacitor section. It is diflicultmechanically to regulate this sequence accurately, especially so iflarge sections are to be wound, as all machine functions are ordinarilydetermined by a one revolution cam geared to the main driving shaft. Ifsections of different sizes are to be wound, the use of mechanical meansto regulate this sequence necessitates repeated adjustment, an operationwhich is both tedious and time-consuming and generally requiresdisabling of the machine while adjustments are being made.

Where mechanical control means are used for regulating the sequence ofoperations of a winding machine that is fully automatic, i. e., onewhich automatically threads the mandrel for each capacitor and where themandrel must be stopped always in the same angular position after eachsection is wound, the rotating mass of the machine will be great, andhence to guard against likelihood of breakdown, the machine -must be runat relatively low speed, for the greater the rotating mass the moresevere the shock of stopping the machine will be to the parts thereof.

It is accordingly among .the objects of this invention tojprovide anelectrical control system for a capacitor winding machine. that is'simple Claims. (01. 175-373) to adjust and when once adjusted willaccurately regulate a sequence of mechanical operations, that willenable the size of successive capacitor sections to be varied withoutdisassembling the machine, that is relatively compact and light inweight and that does not add to the rotating mass of the mechanism, andthe use of which leads to increase in the life of the winding machineand reduction in the amount of servicing thereto,

even when operated at the enhanced speeds permitted as a corrollary ofsuch object.

According to theinvention, the winding control systemv forpredetermining the sequence of operation of a capacitor winding machinecomprises a commutator on the electric motor which drive the windingmandrel, the commutator being designed automatically to deliver periodicimpulses to the electromagnets of a plurality of rotatable steppingswitches, said switches being advanced one step at each impulse from thecommutator.

In the specific embodiment of the invention herein illustrated, thereare two sets of stepping switches,

one set of which has three sections and the other set four sections.Each of the sections of the stepping switches has a rotatable contactarm with ten contacts associated therewith.

Associated with each of the sections of said stepping switchesis amanual selector switch, by means of which the desired sequence ofoperations i predetermined. Each of the manual switches and thecorresponding section of the stepping switches have the same number ofcontacts. The corresponding contacts of said manual switches and saidstepping switches are connected to complete circuits to a plurality ofrelays from a source of current when the stepping switches have beenrotated by the impulses from the commutator to the position set on themanual switch. The relays control a plurality of solenoids which in turncontrol the various mechanisms necessary for the operation of acapacitor winding machine and also control mechanism in the steppingswitches themselves for restoring them to starting or home position.

g Specifically, the initial set of stepping switches regulates the speedof the electric motor, for full speed during the main period of thewinding cycle in which no control operations are performed and. forrelatively slow movement near the beginning and near the end of eachcycle in which various control operations are performed, said steppingswitches also controlling the first timed mechanical action in eachcycle.

The second or final set of stepping switches is out'of circuit until theinitial set of stepping 3 switches has performed the first timedmechanical operation. At that time it causes a relay to be operated forsetting into circuit the electromagnet that operates the second set ofstepping switches, the latter performing the sequence 5 of mechanicaloperations at the times determined by the setting of. the manualselectorswitches, and upon'the performance of the last'wtimed mechanicaloperation under the control of said second set of stepping switches, arelay is ac- 10, tuated by which the stepping switches are caused tomove to home position.

In the accompanying drawings in whichareshown one or more of various.possibleembodiments of the several featuresof'this"'invention, .15;

Fig. l is a wiring diagram of the control circuit,

Fig. 2 is a diagrammatic view of a capacitorwinding machine,

Fig.3 is adiagrammatic view of the mechanical starting mechanism showingthe positive *stop mechanism, and

Fig- 4 is a diagrammatic 'view'of'the" feed roller actuatingmechanism'.

In order to comply with'th'e statutory require ments,one specificexample of "th'eiinventionwill be explained in detailas.appliedf'toi'a"capacitor winding machine of thetype "diagrammaticallyshown in Fig. 2. However, it is"to"be'under= stood that the controlsystem may beutilized for any other winding machine where it" is desired to regulate a sequence ofcperati'ons:

Referring now to the drawings, the'm'anual switches are set to thedesired number"in"ac'- cordance with the specifications ofthe particularcapacitor it is desired to manufacture."

' After the master switch is closed,'treadle 2| is then depressed'by*the operator to start"mo-'- tor M'and thereby begin the sequenceof'operationin the following manner. Tfeadle' 21 is connected by cable22 to a lever 23..pivote'd'at' 23'," the latter being normally urged bya spring 21Tinto a slot 24 in hub 25'ofwinding mandrel 26'. Depressingof 'treadle 2l' will' pivot lever 23 so that its upper end 28 "will'bewithdrawn from slot 24 and press against normally open switches S1 and'SIC' thereby to close said'switches, lever 23beinguheld in this withdrawnposition by a ratchet stop.29. Asithis latching'mechanismis'conventional andforms no part of'this' invention, .it will not be morefully described."

Closing of switchS"-I completes a circuitfrom' positive main P throughleads 3 I; 32', Hand "3!," coil'of relay Ri-I, leads 35and "36'to thenegative'main' N. Relay Ri-I will be energized and thenormally'open"contacts'A, Band C thereof willclose.

A'holding circuit for relay R4 'isth'ereby'com pleted'from'main' Pthrough '-lead"31, normally closed switchS-Z, closed contactA, throughthe coil of relay R-I; leads 35 and 35 to main-N; Thus when switch S-lis'opened"(at the time and for the purpose hereinafter described), re-'lay R-l will remain energized by'virtue of this holdingcircuit andthe'contacts-A; B-andC 5 thereof will remain closed untilnormally'closed' switch 8-2 is opened.

A circuit is also completed" frommain P through leads 3|, 32 and 38,closed contactB ofrelayRk-l, leads 39 and 4B, normally-closed contact-Aof relay R-2,"lead 4| throughthe-start portion of thearmature-resistance M, lead 42; through the armature of motor M'to lea-d13, through closedcontact o ofrelay R l-and le'ad 44---'to main-N. Thefield coil'of motor M'is'also 4 energized, the circuit being from main Pthrough leads 3|, 32 and 38, closed contact B, leads 39 and 45 throughthe field coil to lead 43, through closed contact C of relay R-l andlead 44 to main N.

It is apparent, therefore, that as a result of the energization of relayR-l, a circuit is completed throughboth the fleldand armature of themotor,'the latter running at rediiced speed due to the start portion ofthe resistance 4| in the armature circuit.

At the same time as the motor starts, the feed rollers .53 (Fig. 2)which are normally open duringiwinding of successive capacitor sectionsrbutfclosed at "theend of the winding of each section, fwill'be openedin the following manner dueitorthe. energization of solenoid 48:

When-switch S-l is initially closed, a circuit is completed from main P,leads 3!, 32, 33, 46 and 41 through normally closed switch S-3 and thecoilof relay Bi-3 *to main N5 Energization of re1ay R-3 will close-normally open contact Ath'ereof and energize 'feed roller openin g'sole noid coil 48.

- As diagrammatically shown in Fig. 4; energization-'of solenoid coil48- will draw itsa'rmature 11 49" to the left, thereby causing airvalve'trto release air to open the feed-rollers 53' by'known1 mechanismnot shown herein, inasmuch as it: forms no part of this invention.Movementof armature 49= to the left will: cause contact" 5! carried byrod'52 connected to said-armature: to contact normally c1osed"switch"S 3opening the latter and'breaking the 'circuitfto relay -M and solenoidcoil- 48) However," the air valve? has already b'e'en moved'to' theproper position-'- to openth'e-vfeed rollers andit will remainin'thistposition until feed roller closing solenoid 53 is Y energized inthe 1 manner hereinaftertiescribed."

A- winding mandrel 26 carrying a commutator- 25" is directlydrivenb'ythe armature of the motor. As shown in the drawing; the 'commu'tator-is-icomposed ofaconducting ring-26'- anda segmental ring" 21',-the latter having 'fivecon-'- ducting segments thereon insulated from"each other. One of the segments S of thesegmental ring" 21' is connectedto the i ring 26 by a" lead 55. A fixed brush B lisplaced-so-th'at itmay contact any one 1 of the segmentsas the commu-- t'a'tor'rotates andafixed brush B4 is positionedin juxtaposition to brush B4 9 so that itcan'also contact the same-segment'as does brush B-li' A- third fixedbrush B3 contacts the outer con ducting-ring'ZB;

Once 1 every revolution" of the comm'utator; seg merit S contacts brushB- l This Will completes.- circuit from main P-through leads '3 l';32,33;- 46-; 4-Tand56, brush'B l, segment S, lead "55, ring 26', brushB-3, lead 51', normally closedcontact A-ofrelay RJ-4;lead 58"; coil E ofSteppingIsWitch A'an'd lead'59' to main'N.

It is apparent therefore that an v.impulse will be delivered. to .coil"E once every revolution ofathe. mandrel.

I'he stepping switches used herein areof con ventionalv type and. are:designated-SS in. the. drawings. In the embodiment shown, steppingswitches-Av and B each-has three: sections and stepping. :swit'chesi G.and -D each has foursections; each sectionhaving. ten: contact: pointsand a a neutral .positionz andqa rcontact arm K moving one step I at'each impulse! The :contact arms ofthe several sections of each-switch-A,- Bf-C*and-'D' are mechanically-ganged so that they move inunison. 1 I I Themanual switches used herein are designatedMS in thedrawings and each has the same number of contacts as its respectivestepping switch section. The contacts of each of the manual switches arerespectively connected to the correspondingly numbered contacts of thecorresponding stepping switches, i. e., contact of each stepping switchis connected to contact of the corresponding manual switch and so on. Inorder not to confuse and complicate the drawing, only one of suchconnections is shown in Fig.1.

It is desirable to speed the winding operation once the capacitorsection has begun to be wound on the mandrel and there is no longer anydanger of tearing the foil or paper due to a sudden start of the windingmandrel.

At this time it should be noted that the positive side P of the mainline feeds through leads 3|, 32, 33, 46, 5B, 51 and 58 and branches offthrough leads 59, 32 and 63 into the contact arms K'of stepping switchA. As there are ten contacts and a neutral contact on each section ofstepping switch A, when the commutator has rotated ten times, deliveringten impulses to coil E as above set forth, a circuit will be completedto coil F of steppingswitch B, as will now be described. D

This circuit is from main ,P through leads-3|, 32, 33, 46,56, 51, 58 and62, contact arm K of stepping switch A (foil perforator) which has nowadvanced to contact ID of this section of the stepping switch, lead 66,normally closed contact B of relay R-5, lead 61 through coil F and lead69 to main N.

It is thus apparent that at every tenth revolution of the windingmandrel and commutator,-

an impulse will be delivered to coil F of stepping switch B advancingthe contact arms K thereof one step. Stepping switch B is similar tostepping switch A which has been previously described. It can be seenthat stepping switch A counts units while stepping switch B counts tens.

Assuming that'it is desired to accelerate the armature after fifteenturns have been wound on the mandrel, manual switch A (accelerator)would be set for five and manual switch B (accelerator) would be set forone.

After the first five revolutions of the winding mandrel and commutator,a circuit would be completed from main P through leads 3 I, 32, 33, 46,56,57, 58 and 59, stepping switch A (acceb erator) now rotated toposition five, lead 31), manual switch A.,(accelerator) which hadpreviously been set to position five, lead 6| into stepping switch B(accelerator) As coil F of stepping switch B has received no impulsefrom stepping switch A after five revolutions of the latter, as abovedescribed, no circuit will be completed through the accelerator sectionof stepping switch B. As the contact arm of stepping switch A (foilperforator) rotates to'ten an impulse will be delivered to coll F ofsection B as hereinabove described, causing the contact arms of steppingswitch B to advance one step. At this time manual switch B (accelerator)and stepping switch B (accelerator) would be series connected but thcircuit in this line will have been broken by the advancement I of thecontact arm of stepping switch A (accelerator) from five to ten. Thecircuit will not switch A (accelerator) advances'five more steps toposition five which it does after fifteen revolutions of the commutatorand winding mandrel. At this time a circuit will be completed from mainP through leads 3|, 32, 33, 46, 56, 51, 58 and 59, stepping switch A(accelerator), lead 60,

manual switch A (accelerator), lead 6|, stepping switch B (accelerator),lead 10, manual switch Bv (accelerator), lead 1|, through the coil ofrelay- R-(i, leads l2, i3and 69 to main N.

Energization of the coil of relay R-6 will caus the normally opencontacts A and B thereof to close. Closing of contact. B will shunt outthe start portion of the armature resistance and thereby speed the motorasthe circuit will be.

through leads 39 and 4|],normally closed contact A of relay R-2, lead4|, closed contact B of relay R-6 and lead 42.

As the circuit completed through the accelerator stepping switches isonlymomentary, it is necessary to provide a holding circuit that willkeep relay Re-ii energized and contacts A and B thereof closed. Thiscircuit is completed by the initial closing of contact A of relay R-Gwhich completes a circuit from main P through leads 3|, 32, 33, 46, 5E,'14, 15, i6 and TI closed contact A of relay 12-6, the coil of relayR-fi, leads [2, l3 and 39 to main N. Thus, even though the acceleratorstepping switch sections have broken the circuit, relay R-fi will remainenergized as a result of the circuit just described and the entirearmature resistance will continue to be shunted out of the circuit.

The winding operation is now proceeding at full speed. After the desirednumber of turns have been wound on the mandrel, the foil is perforatedpreparatory to tearing. However, it is desirable to slow down themotorto half speed prior to perforation to prevent overrunning of thepaper and foil and improper perforation of the latter. This is done asfollows:

After a certain number of turns have been wound on the mandrel, forexample '75, it is desired to decelerate. Manual switch A (decelerator)is set to live and manual switch B (decelerator) is set to seven.

As has been heretofore explained, each tenth turn of stepping switch Awill send an impulse to stepping switch B and advance the contact arms Kthereof one step. After seventy-five turns of the mandrel andcommutator, the contact arms of stepping switch B- will have advanced toposi tion seven and the contact arms of stepping switch A will haveadvanced to position five. A circuit will now be completed from main Pthrough leads 3|, 32, 33, 46, 56, 51, 58 and 63, stepping switch A(decelerator) lead 83, manual switch A (decelerator), lead 8!, steppingswitch B (decelerator), lead 82, manual switch B (decelerator) lead 83through the coil of relay R-2 and leads 84, l2, l3 and 69 to main N.

Relay Rr2 will thus be energized, thereby opening normally closedcontact A thereof and closing normally open contact B. Opening ofcontact A breaks the shunt around the stop portion of the armatureresistance and places it in the motor circuit, thereby slowing themotor.

A holding circuit for relay R-Z is completed from main P through leads3|, 32, 33, 46, 56, 14, I5, 235, closed contact B of relay R-2 throughthe coil of relay R-2 and leads 84, l2, l3 and 69 to main N. v

' If it is desired to perforate the foil after eightyfive turns havebeen wound on the mandrel, manual switch A (foil perforator) is set forfive and manual switch B (foil perforator) is set for masses eight;vAiter'eightyefive turns :ofithe mandrelandsr conmmtator;:. an circuit;will be: 1 completed from: main'r'Rycthirou'gh leade -3I;o32;;33,.46,a56, v.51; 58A and .62, steppingiswitch :A (foil IDBIfDmtOI), lead-191- manual.- switchsA (ioiliperforator) lead 86; steppingswitchii'(foiliperforator) lead: 8]; man; 113.11.3Withi B:(foil .perforator)lead-88; through: thelcoil of relay: R l'glead's 13' and GSa'toimaimN:This will energizeurelamRi-l andfclose normally,openzzcontact-:Anthereofl Thee closin'g ofcontact A .of \relay 1R willcome plete :aicircuitsfrom'mai-rrB through leads 3 I; 32;: SScASeJ'SHM'," 15,? v16,: closed: :contact'A of 1 relay; Re! ,& leads 913193sand? th'rouglsu the: coil ofsrelays Err-4;; lead :95 to :maim N.Energizatiorr; oflzrelayf; 15

R' ltwillr; openz: the normallwclosed: contact A thereof and break thecircuit-fromfthe commutator'zto;stepping swit'ch A;

Attheisame itime,1 the completion of the circuit:='througlrtheifoiliperforator switcheszwill complete; a .circuit .frommain .P to lead.x88 "as heretofore". described; lead 96: to the: foilperforaton solenoid-c 9.1; lead .98 .to mainLN. This :will'.actuatetheifoil perforatorxmechanism- 914" and perforate the *foil; atthe; 85thiturn.

Inzraddition a circuit will be.-complet'ed':.from;. main 'P'throughleads3l; 32'; 33,46, 55; i4, 'ISJand' 16;.closedrcontactz A :of: relay:R.-'l, leads? 92. and; 99 :through the coil of relay R'-5 'and leadz98"to main; N thereby. energizing: relay-R45 at. the same time that thefoil. is'uperforatedz andc the impulses from the commutator cut off fromtheisteppingswitches by the energizationofxrelay R4;

Energization off relay .P..-:5.:will affect contacts A, B-;-,C, D, E and'Fithereofimtherfollowingmana. nor: s

1. Normally open contactkwill close; comp1eting a circuit; from main?through. leads i3-l, 32, 33,- 46, 56; l4 andl 80; closedicontact A: of.relay R-E, lead 40!, normally closed contact A ofrelay Ri-B; lead I 02:contact X of .coil F. of stepping switch B'through coil -T andzlead69'I'to main N. Contact X is part ofia makeiandrbreaki switch similar toa buzzerior vibratorand mill vibrate when coil F isenergized,.makingandrbreaking the circuit through coil F andctherebycausing the'contact arms of stepping. switch'B toiadvance veryrapidlyctorthe neutral orfhomeiv position.

2. Normally closed contact Bwill open breaking-;the circuit .tocoil-F'ofistepping-switch B. Ordinarilywhen the contact arm Kof steppingswitch A (foil .perforator) 'comesitooposition."H1; acircuit iscompletedvfrom; main P Tthrough: leads 3!, 32, 33, 46;. 56; 57,158 .and-82, stepping switch A (foil perforator) lead 66, normally closed.'con;--tact B-of relayJR-ilead 61, coil .E'and leadv 69: to main N.This'circuit causes steppingswitch. Brtoadvance one step. at each tenthrevolution of the commutator. Such action is not wanted, at this time,as stepping switch Bis now advancingto the home position due to closingof contact Azof relay R5.- Opening of normally closed contact B of relayR-S prevents this movement 3. Normally open contact C closes, completinga circuit from main? through leads 3!, 32, 33, 46, 56, M and l03,'c1osedcontact 0, lead Hi l-mormally-closed contact A of relay R-S; lead- I05,contact Y of coil Eof stepping switch A, through coil Eandlead 597- tomain N.

The "operation of contact Y is similar to that of contact X describedabove and the contact armsKvof stepping, switch A will advance veryrapidly to the neutral-or home position.

4. Normally open contact'D will close: to complete a circuit frombrushB2 .ofthe commutatorto; coil: G ofcstepping ;-switchi v flhe;.circuit,is as follows: From main P through leads 3|, 32 -33, 1

46, and 56%,; brush 3-! thesegment; bnusheB l, leadsllllpclosed'contactD of relay It-li; lead-I06.

-, normally; closed-contact A of relay, Rr-lll u lead,

Hi8; coil .G of 'stepping switch i C, leads.-l I0, 90,. 73-1-and'69-to"main"Ne As there: arefive:.segments on the segmental.

foil hasbeen perforated.

5. Normally open contact E will close to comaplete :the :circuit frommain; P. throughleads II 3232133; 46, 55,5! hand: I l-l;- ,closed-.contact Jib; lead,

l 12 to ithe contact arm Keot stepping-switch Bi (foil i'perforator)thereby connectinggthiscarm to. the positive main P-for-theereasonhereinafter; set-forth:- -c

,7 6; Contact'fF will close :to hold. contact. -A to! relayu 5 open bycompleting, :the circuit irom'" main P: through ileadsrr3I;-,132,133,16; 56; Jl -andt I I3; closeckcontact; F; lead 94 through the 10011:ofzrel-ayiPei and 162G195 to mainz-N; Relay isralsor kept energizedbylthe closing-of contact F: thereof v by :the- 'completiontof- -acircuit from. mairr P through 1&dS:-3l,,32 33,' 46; 56;." and H 3,closed icontact1F;-'leads 93-anda39 through the: coil of relay R5 andlead 88 to main N."

It visznow necessary:"torstopg-theEhoming action of: stepping {Switches:3 whenfithey reach neutral or: home? position.

Whemthezcontact" arm :K of. steppingl-switch A: (foi-liperforator): getsto-neutral positiomthere will'xbe a: completedv circuit? iromvm'ain'Pivleadst 31, 32, 33, 48, 56, 5?, 58 andlifill; contactarm'aK; of:stepping; switch .A (foil perforation), lead .|.l 4throughrrtheecoilwofz relayzReB land; leadsi l I 5;- .13 and:fiflto-wmainiNn. Asrelay RPS nowwener gized, norma1ly closed'conta'ctA:thereof will431mm,- breaking thecircuiti t'o contact'iY 0f stepping)switchtA and stopping/the: homing. action: when: all vthekcontactv armsoof stepping switch A arerat neutralepositi'on: a

The-closing: of: contact E offlrelay' Ri-SWSOH- nected' the contactarmrrK- of; stepping switch-B:

(foil perforator) to: positive' mainaPzi v Whenvthe 7 neutral 1position.

Thernext' (operation-tin the:sequenc'e of opera tions to occur is thegripping. of'itheifoil' :by the foil: gripper imechanism l whichwillcause the foil to tear acthe place of perforatiom Thislgripe ping;is only momentary; blltu sufficient ItO-i cause tension to-be :exertedzOmthe foil; thereby-cans; ing. it ztoztean Manual switch. 0 (foilgrippers) and'D- (foil grippers) are set for the proper hum-, her ofturns after: theafoil' hasl beencperforated so that the perforatedportionof the-foillwilllbe betweenthe paper cutters- I484 and'ithevfeed'rollers:v 53 (which' are: in open-position; having been: ropenedasheretoforevsetl forth l. Stepping switch-C is not energized untilthe-normally, open contact D of relay R iv iseclosed a heretofore.described. Closing of contact Doccurs at the sametime that the foil isperforated. Inasmuch as five impulses per revolution of the mandrel andcommutator are being transmitted to coil G of stepping switches A and B,switch C registering units and switch D tens and will not be describedin more detail.

The circuit to energize relay R-II forthe foil grippers is as follows: IFrom main P through leads 3|, 32, 33 and Ill, stepping switch C (foilgripper), lead H3, manual switch C (foil gripper), lead II9 to manualswitch D (foil gripper), lead I28, stepping switch D (foil gripper),lead IZI, normally closed con tact A of relayR-II through thecoil ofrelay 'R-I-2' and lead I22, to main N. Energization of relay Rr"|2 willclose the normally open contact A thereof, completing a circuit frommain P through leads 3! and I23, closed contact A of relay R-I2, leadI24, through foil gripper solenoid I25 to main N. This will close thefoil grippers so that the foil is torn at the point of perforation.

As thereis no holding circuit-on the foil gripper relay R-IZ, as soon asthe stepping switches C' and D have advanced, the circuit to the coil ofrelay R -I 2 will immediately open and the circuit to the foil grippersolenoid coil I25 will be broken,

thereby releasing the foil gripper mechanism.

- It is important that once the foil grippers close and open, they donot repeat this operation until the next section is wound. For thisreason a normally open switch S-4 is provided, which is meohanicallyoperated by the closing of the foil grippers. Closing of switch S-4 willcomplete a circuit from main P through leads 3 I, 32, 33, I I1, switchS4, lead I2! through the coil of relay R-I I and lead I22 to main N.Energization of relay R-II will close normally open contact B thereofand open normally closed contact A thereof, breaking the circuit torelay l t-I2, thereby opening contact A thereof and breaking'the circuitto solenoid I25.

In order that contact A of relay R-II remains open after switch S4reopens a holding circuit for relay R-l I is provided as follows: Frommain P through leads 3I, I23, closed contact B of relay Rr-l I, leadI2'I through the coil of relay R-I I and lead I22 to main N.

The next step in the sequence of operations is the closing of the paperfeed rollers 53. These rollers are normally in an open position duringthe winding of each new section in order to prevent drag on the paperand foil during the winding operation since the peripheral speed of thepaper past the feed rollers varies with the diameter of the section asit is being wound. If the feed rollers are driven at a peripheral speedgreater than the speed of the paper, the section will be loosely woundand there will be a loop between the feed roller and the paper; if alesser speed, there will be a drag on the paper resulting in tearing ofthe same.

In the open position of the feed rollers, switch S-3 is openasheretofore explained and shown in Fig. 4. The coil of relay R-3 is notenergized and contact A thereof is open as is the circuit to the feedroller opening solenoid 48. However, the feed rollers remain open asheretofore explained.

The feed rollers must be closed after the foil has been perforated andthe foil grippers closed and kept closed until the mandrel begins toturn to wind a new section, as it is necessary to mainnoid A3 andenergizing the latter.

by energizing relay R-I 5.

er) are setsothat they will operate slightly after the foil gripper I25.A circuit is completed from .main P through leads 3!, 32, I Il and I33,stepping switch C (feed roller), lead I3I, manual switch C (feedroller), lead I32, manual switch D (feed roller), lead I33, steppingswitch D (feed roller), lead I34 through the coil of relay R43 and leadI35 to main N. ,This energize relay let-I3 and closes normally opencontacts A and B thereof. Contact B of relay R-I 3 closes to hold relay,Rr' 3,

the circuit being from mainP through leads 3I,

32, 33, I IIand I36, closed contact B, through the coil of relay R-I3and lead I35 to main N.

@Closing of contactA of relay R-I3 energizes feed roller closingsolenoid 53, the circuit being from leads 3|, 32, 33, II! and I38,closed contact A of relay B l-I3, feed roller closing solenoid 5 3 aridlead I40 to mainN. i When solenoid 53 'is'energized, as shown ,in Fig.4, armature IIH thereof is pulled to the right, moving rod 52 connectedthereto, and switching the air valve 50 so that the feed rollers 53close. Movement of rod 52 will causecontact 5| to move away fromswitchS-3 closing the latter and completing the circuit to feed rolleropening sole- However, though both solenoids '43 an d 53 are nowenergized and pulling in opposite direction, since solenoid 53 wasenergized first, it exerts the greater pull and keeps the feedrollersclosed. Since the entire circuit is cut off a few turns hence, therewill be no appreciable heating of the solenoids;

The next step in the sequence of operations is the cutting of the paper.Manual switch C (pa per cutter) and D (paper cutter) are set for thepredetermined number of turns. A circuit is completed from mainPthr'ough leads 3I,-32, 33, Ill,

I3I) and l42, st epping switch A (paper cutter), lead I43, manual switchC (paper cutter), lead I44, stepping switch D (paper cutter), lead I45,manual switch D (paper cutter) lead M5 through the coil of relay R-I 4to main N. o

Energizati'on of relayRel l will close the normally open contact Athereof and momentarily complete a circuit frommain P through leads 3I,32, 33 and Ill, closed contact A of relay R-M, lead I4'I, paper cuttersolenoid I48 to main N, thereby cutting the paper.

' "The next operation is the resetting of the circuits to startposition.

Manual switch C(reset) and D (reset) are set to closerestoring'circuits' a, proper number of turns after the cuttingoperation has been performed.

There will be a circuit completed from main through leads 3i, 32,33, Illand I49, stepping switch 0 (reset), lead I50, manual switch C (reset),lead I5I to stepping switch D (reset), lead I52, manual switch D(reset), lead I53 through the coil of relay R-I5, lead I53 to main N,there- As has been previously set forth, at the same time as switch -S-I closed, switch S-I closed, completing 'a circuit from main P throughleads 3i and I56, through the coil of relay R-Itand lead I5! to main N.Energization of relay R-Ifi closed normally open contact A thereof,completin'g acircuit from main P through leads 3? and I58 closed contactA of relay R-IB, lead I59 to the contacts of relay'R-I5.

ix-guitars $11 1 Energization .of .:relay R-=t5 will affect :con-

1.. Normally open contact A .of "relayiR-I5 .closes, completing acircultifrom'main P through 7 leads 31, I58, closed contact A,'relayRIB, lead "[59, closed contact A relay R-l 5, lead" [60, .nor-

-mallyoclosed contact A of relay R-ILflead I BI,

contact Z through coil H of istepp'ingswitchD, ,lead I62Lto main'N. The,make andvbreak operation of contact'Z which iss'imilar-to-fcon--,,tacts X and Y or ,steppingswitches .B and ;A has vbeen previouslydescribed and "will quickly home .thecontactlarms of :steppingr'switch2D to neutral, position.

v2. Normally-closed contact B .opensand'lbreaks the circuit fromsteppingswitch C (reset). point I to contact Z of-coil H.,Asuhasibeeneheretorfore explained with respect.tosteppingswitchesA--and B at every completerevolutionwof stepping switch C, an impulse issent to ,the coil of stepping switch D. Since ,the contact armrofstepping switch C,(reset) is connected .to positive. main-P by reason ofthe circuit. from main Pithrough vleads..3l, 32, 33, .I I1:and..i49T.to-,the

contact arrnK, it is. important that'noiimpulse be. transmitted to. coilH while the resetting, .operaticn is on. Consequently the opening of.nor- .mally closed contact ,3 breaks .the circuitfrom the contact Zthroughelead I63, contact B, lead I64- to point In ofnstepping switchC(reset) -3. Normally open contactC closed, completingfa circuit frommain? through leads 31,158,

closed contact-A ofrelayRI6, lead I59, .contact C, lead I65 through-thecoil of relayR-IO,

lead I66 to main N, thereby energizing-relay ,R-llnopening normally,closed contact-A there- .of and breaking the circuitfrom brush B-Z,lead I 01, closed contactD of relay R.-.5, lead I06,

normallyclosed contactrA ,of relay R-IILolead I08 through coil G ofsteppingrswitch c leads H0, 90, 13 and 69 to main .N. This will stop:the movement of stepping switch-IO caused by the rotation, of thecommutator.

.Closing of contact .0 of relay;R I;also holds relay R-I5, the circuitbeing from main -P through leads- 31, I58,-closed contact A of relayR-I6, lead I59, contact ,C Ieads I55 .and'IGI 'Lthrough the coil of rrelay .R-I 5;and .lead I54 .to

,A of relayR-IB, lead l59, c1osed contact. D, lead I68 andthe contactarm .of stepping switchD (reset). When the positive contact arm ofstepping switch D (reset) reaches neutral position, there islacircuitfrom this positive con tactoarm through lead 189 and the coil ofrelayR-I'I and lead I'Ill to main N. Energization of relay R-I'I opensnormally closed con- .tact A thereof and stops the ifhoming ,action ofstepping switch D.

'5."Normal1y open contact ;E of v relaylRD-IS closes tocomplete acircuit through relay 'R-IB f'as follows: :Main P through gleads 31,I58, "closed contact Ajof relay RI6,I lead I59, closed *contact E, lead"I throughthe'coil of relay -R-I8, lead I12 to main N.iThis'energizesrelay R-I8-and closes'normally open'co'ntact A thereofwhich completes a circuit from main .P through leads 3I,'-32,'33,"I13,positive'stop latch solenoid 30, closed-contact A;of;relz a,y"R I8and lead 35 to main N.

'Energlzation of *the positive --stop latch solemid "-0011 -30, asashown'in Fig. -"3,- causes s op lever -29 Y to be pivoted, therebyreleasing lever 23 *which pulledunder the tension of spflng 'Z'Iagai-nst rotating-hub 25, the enema-101 mm lever entering the slot fl inthe hub when the two are aligned. There will j-be a slight overrunning'of the mandrel 26 due tothefactthat lever 23 is "pivoted-asat 2|.Theslight'overrunning will cause lever 13 -'to press *ag'ainst switch"S-Zand'open this switch. A's'lever 23 pivoted'toward the hub,it*released switches's l and *S-I permittingthem "to open. "It is to benoted that the positive stop ensures that the mandrel-Will be'ln thesamepositionat -theeend of the winding of each capacitor-section.

Openin'g of normally closed switch S4 will break the holding circuit on.relay R-I, opening contacts -A, B and 1C thereof and *brea-kingthecircuit tothemotor.

-6. -Normally-open contact F when closed starts homing-ofstepping-switch C, the circuit-being from main? "through loads 31, I58,---closed--contact A of =re1ay"R,-I6,-1ead I59, closed contact F,lead I15, normally closed -contact -A of relay R-I9 through contact W ofstepping-switchD which has -a make and break "moyement, through 'coil G,leads I I'll; 9Il,"13 and 69-to main N; 'thereby'homing" steppingswltchC.

Whenstepping switch C (reset) gets to neutral position, 'itcompletes acircuit from --maln Pthrough leads 3I,-32,-33, Il'l'and I49, steppingswitch "C (reset) 5 through the neutral contact, lead I16 throughthe*coil of -r'e1ay'-R-I 9,*'lead l 11 to r main N. =Energization "of relayR I9 opens normally =close'd 3 contact "A thereon-arid breaks -thehoming circuit.

Itis to 'ben-oted'that :even though '1' the motor "circuit is opened *asa result of 'the-'openin 'g of switch S-Z switchesS-I ands-1 areopene'd,the circuitto'the contacts ofre1ay'-R-=I5-remains closed in erderthatthe'resetting' action-may be completed.

This is the result o'f'the condenser C-a'crossthe coil'of relay R-"Hiand-the resistance Rimseries with the coil. --'-'When the'coil wasinitiallyenergize'd, condenserC-was charged. WT-hen switch -S- I isopene'd, -'con'denser C 'discharges slowly through the co'ilof'--relay*R-I6, thereby-keeping "the latter energized for a short'period of timeso that the resetting operation-may be completed.

"The-control system isnowready for-the next section to be -wound.

-It--is---aparent that once theproper settingsare made, any 'number' ofsections maybe-wound. Ifit is desired at any time to change'thenumber ofturns on the sections,- it is 'only a-question of resetting the manualswitches, this operation be- 3 ing very-simple and taking 'only a "fewseconds.

"As manyehanges'couldbe made'i-n the above construction and system and"many apparently widely di'fierentembodiments of this invention-could-be made--without departing from the'scope of the claims, itisintended that" all matter contained in the above descriptiomorshown-in the accompanyingidrawings'shall'loe interpretedas illustrativeand not, in a limiting" sense.

Having thus 'described:my invention whatI claim has, new and .idesire tosecure I by .Letters ;P atent.,of theZUmtedfStatesis:

1. ,Anselectrical controlv system. comprising an electric. motor, meansto. start; saidmotor, .a.'first .set. of. automatically. rotatable,sw'itcheaa second 5 set .of automaticallylrotatable.,switches,-..electromagnetic means associated with each of said sets ofswitches intermittently to rotate the latter,

.mea'ns driven by said motor for automatically "ducting ring and asegmental conducting ring insulated from said continuous conducting ringand comprising a plurality of conducting-segments each insulated fromthe other, one of said segments being connected to said continuous ring,

abrush normally engaging said continuous conducting ring and connectedto said electromagnetic means associated with said first set ofswitches, a pair of brushes adapted simultaneously to engage successivesegments of said segmental ring, one of said brushes being connected toa source of current and the other of said brushes being connected tosaid electromagnetic means associated with said second set of switcheswhereby upon each complete revolution of said commutator. and engagementby the brush of said pair of brushes connected to said source of currentwith said segment connected to said continuous conducting ring, acircuit will be com pleted through said brush engaging said continuousconducting ring to said electromagnetic means associated with said firstset of svitches and upon each engagement of each of said segments ofsaid segmental conducting ring with said pair of brushes, a circuit willbe completed through said brushes to said electromagnetic meansassociated with said second set of switches.

2. An electric control system for predetermining the sequence of aplurality of timed mechanical operations, said system comprising anelectric motor, means to start said motor at reduced speed, a pluralityof stepping switches each having a home position, means controlled bythe rotation of said motor to deliver successive electric impulses tosaid stepping switches, means controlled by said stepping switches toaccelerate said motor, means controlled by said stepping switches todecelerate said motor, and actuated at an advanced part of the cycle ofoperation, an initial timed mechanical action under control of saidstepping switches subsequent to said time of deceleration, means todeliver impulses at a rapid rate to said stepping switches to restorethe latter to home position after said initial mechanical action, arelay under control of said stepping switches actuated at the time ofsaid initial mechanical action, said relay having a lurality of switchesincluding a switch controlling the means to deliver impulses to homesaid stepping switches, and means after said stepping switches havereached said home position, to stop said homing impulses.

3. An electrical control system for predetermining the sequence of aplurality of timed mechanical operations, said system comprising anelectric motor, means to start said motor at reduced speed, an initialset of stepping switches, a final set of stepping switches, saidstepping switches each having a home position, means controlled by therotation of said motor to deliver successive electric impulses to saidstepping subsequent to said "time of deceleration,means to deliverimpulses at a rapid rate to said initial set of stepping switches torestore the latter to home position after said initial mechanicalaction, a sequence of timed mechanical actions under control of saidfinal set of" stepping switches, a relay undercontrol of said initia1set a of stepping switches actuated at the time of said initialmechanical action, said relay controlling a plurality of switchesincluding a switch controlling the means to deliver impulses at a rapidrate to said initial set of stepping switches to restore the latter tohome position after said initial mechanical action, and said normallyopen switch in series with said final set of stepping switches, wherebyon closing of said normally open switch, said final set of steppingswitches will be actuated to determine the sequence of timed mechanicaloperations following the initial timed mechanical operation, and meansto deliver impulses at a rapid rate to said final set of steppingswitches to restore the latter to home position.

4. The combination set forth in claim 3 in which a relay is providedunder control of said final set of stepping switches actuated at thetime of the last timed mechanical operation following the initial timedmechanical operation, said relay controlling a plurality of switchesincluding a switch controlling the means to deliver impulses at a rapidrate to said final set of stepping switches to restore the latter tohome position, and means after said final set of stepping switches havereached home position, to stop said homing impulses.

5. An electric control system for predetermining the sequence of aplurality of timed mechanical operations, said system comprising anelectric motor, means to start said motor, a plurality of steppingswitches each having a home position, means controlled by the rotationof said motor to deliver successive electric impulses to said steppingswitches, an initial timed mechanical action under control of saidstepping switches, means to deliver impulses at a rapid rate to saidstepping switches to restore the latter to home position after saidinitia1 mechanical action, a relay under control of said steppingswitches actuated at the time of said initial mechanical action, saidrelay having a plurality of switches including a switch controlling themeans to deliver impulses to home said stepping switches, and meansafter said stepping switches have reached said home position to stopsaid homing impulses.

6. An electrical control system for predetermining the sequence of aplurality of timed mechanica1 operations, said system comprising anelectric motor, means to start said motor, an initial set of steppingswitches, a final set of stepping switches, said stepping switches eachhaving a home position, means controlled by the rotation of said motorto deliver successive electric impulses to said stepping switches, anormally open switch in circuit with said final set of steppingswitches, an initial timed mechanical action under control of saidinitial set of stepping switches, means to deliver impulses at a rapidrate to said initia1 set of stepping switches to restore the latter tohome position after said initial mechanical action, a sequence of timedmechanical actions under control of said final set of stepping switches,a relay under control of said initial set of stepping switches actuatedat the time of said initial mechanical action, said relay

